APA (7th ed.) Citation

(1990). Library of Congress Subject Headings: F-O (13th ed.). Library of Congress.

Chicago Style (17th ed.) Citation

Library of Congress Subject Headings: F-O. 13th ed. Washington D.C: Library of Congress, 1990.

MLA (8th ed.) Citation

Library of Congress Subject Headings: F-O. 13th ed. Library of Congress, 1990.

Warning: These citations may not always be 100% accurate.